What is Alcian blue technique?
PRINCIPLE: Alcian blue is a group of polyvalent basic dyes that are water soluble. The blue color is due to the presence of copper in the molecule. The 3% acetic acid solution (pH2. 5), Alcian blue stains both sulfated and carboxylated acid mucopolysaccharides and sulfated and carboxylated sialomucins (glycoproteins).
What is Alcian Blue staining used for?
The alcian blue stain is used to stain acidic mucus and acetic mucins. Excessive amounts of non-sulfated acidic mucus are observed in mesothelioma. These phlegm are present in normal amounts in the walls of the blood vessels but increase in early lesions of atherosclerosis.
What type of stain is Alcian blue?
1) Alcian Blue Alcian Blue is a basic dye containing copper, which gives it the blue color. The stain molecules carry a positive charge and are attracted to the negative mucins. Adjusting the PH of the Alcian Blue solution allows the demonstration of sub-types of acid mucins.
What is Alcian blue PAS stain?
Alcian Blue/PAS Stain Kit is intended to identify acidic and neutral mucins in tissue sections on the Artisan Link and Artisan Link Pro Staining Systems. Alcian Blue pH 2.5 stains the acid mucin blue while the Schiff’s reagent stains the neutral mucins pink to red.
Why is Alcian blue blue?
Alcian blue is the name given to a family of polyvalent basic dyes. These dyes can react with compounds containing anionic groups such as acid mucosubstances and acid mucins. They color blue because of the presence of copper in the molecule. Several methods that use Alcian blue at different pH values are available.
Does Alcian blue stain cartilage?
Alcian blue and Alizarin red stain cartilage and bone, respectively. As a cationic dye, Alcian blue binds strongly to sulfated GAGs and glycoproteins, while Alizarin red, an anionic dye, binds to cationic metals such as calcium [1].
Is Alcian blue acidic?
Thus the standard Alcian blue – pH 2.5 stains all acidic mucins (Figure 3). In contrast, mucins that contain predominately carboxylated carbohydrates will stain strongly with Alcian blue – pH 2.5 but not with Alcian blue at a pH of 1.0.
How does Alcian blue stain cartilage?
As a cationic dye, Alcian blue binds strongly to sulfated GAGs and glycoproteins, while Alizarin red, an anionic dye, binds to cationic metals such as calcium [1]. Because cartilage contains higher concentrations of GAGs than any other tissue, it binds more Alcian blue.
How do you make Alcian blue solution?
Dissolve the dye in the distilled water, add acid, mix well. Filter into the reagent bottle and filter before use. Dissolve 1 gm of alcian blue in 90mls of distilled water and 10mls of 1N hydrochloric acid.
Does Alcian blue stain bone?
Endochondral bone formation occurs after cells in mesenchymal condensations differentiate into chondrocytes. These cells secrete a cartilaginous extracellular matrix rich in proteoglycans, glycosaminoglycans (GAGs), and collagen (types II and X). Alcian blue and Alizarin red stain cartilage and bone, respectively.
Does Alcian Blue staining hyaluronic acid?
Alcian blue is a large conjugated dye molecule that initially was used for the dyeing of textile fibers. This accounts for the staining of the proteoglycan/hyaluronic acid components of connective tissue and cartilage with alcian blue at a pH of 2.5.
Is Alcian blue a basophilic stain?
… on histochemical staining and cell surface expression we characterized the cultured cells as basophil-like. These cells stain with Alcian blue, a characteristic only seen from human peripheral blood basophils and tissue MCs (Fig 1).
How do you make Alcian blue stain at home?
1. Deparaffinize and hydrate to distilled water. 2. Place in 3% acetic acid solution for 5 min followed by staining in Alcian blue solution, pH 2.5 for 30 min. 3. Rinse in distilled water and counterstain with filtered nuclear fast red solution for 5 min (optional).
Why do Alcian blue stains have a low pH?
They color blue because of the presence of copper in the molecule. Several methods that use Alcian blue at different pH values are available. A general method uses an Alcian blue solution at pH 2.5. This Alcian blue solution with numerically low pH value can stain many acidic mucins and acid mucosubstances.
How to stain sulfomucins and proteoglycans with alcian blue?
To selectively identify sulfomucins and proteoglycans a low pH (pH 1) alcian blue solution should be used. Add 1.0 g alcian blue 8GX to 100 ml of 0.1 N hydrochloric acid. The staining procedure and incubation times are the same as those in the alcian blue pH 2.5 protocol. Alcian blue is the name given to a family of polyvalent basic dyes.
How do you make 8g of Alcian blue solution?
Alcian blue solution, pH 2.5: Dissolve 1 g of Alcian blue (8GX) in 100 ml of 3% acetic acid solution. 1. Deparaffinize and hydrate to distilled water.